The diameter of the street light poles depends on the height, the installation place, and the weight of the lamps. Roughly speaking, we can decide the diameter according to the height. The bottom diameter of 7-meter street light poles can be between 140 et 145 mm, while that of 8-meter poles can be 160 et 165 mm. And every country has its own regulations about the smallest value of the diameter.
Plus de lecture: Hauteur des lampadaires: Quelle doit être leur taille?



